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Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3...

Chemistry
JAMB 2002

Three drops of a 1.0 mol dm-3 solution of NaOH are added to 20 cm3 of a solution of pH 8.4. The pH of the resulting solution will?

  • A. Close to that of pure water
  • B. Unaltered
  • C. Greater than 8.4
  • D. Less than 8.4
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Correct Answer: Option C
Explanation

A strong base is one that fully dissociates to give ions in solution. Weak bases only partially dissociate in a solution,

while the strong bases dissociate fully in a solution. Weak bases have pH 7.3 – 10, strong ones have pH 10 – 14.

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